Can i change fuel injector/ cleaner brands after the first fill fill to diff brand?

hi last to fill ups in a older car i used Pennzoil fuel injector an this is my 3rd fill up today because gas is low so basically this fill up can i use red line fuel injector cleaner?|||yes.. it will not cause any problems .as most fuel additives are made so they can be mixed with out causing any problems.|||Yes you can.You won%26#039;t hurt anything by change different fuel cleaners,but it would be good to have the fuel filter change after useing a fuel cleaner for awhile,because the c leaner will send all your trash out of the fuel tank and cause your filter to clogged.